Yeah, is it a Sebright mix? Cute bird... it's just other genes coming out in the coloring would be my guess..... my black Cochin and my Black Araucanas started out all black, but as they have gotten older, other colors from their genepool are showing through more and more

Thank you, whatever it is, it sounds like it's benign. I was worried that maybe she had some kind of parasite or something. I hope she's not starting a molt, it's going to be very cold here really soon in Minnesota.

She could be in the middle of a molt. My girls never lost all of their feathers at once, as some were falling out, there were more right there coming in. They look like pin feathers to me. There are nice new feathers inside. The outside will fall off and left behind is the new feather! She will be fine!